Chuck



June 15 1926.

W. M. ZIEGLER CHUC K Fil'ed Oct. 2, 192

- INVENTOR.

. ATTORNEYS.

latented June 15, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM M. ZIEGLER, OF DAYTON, OHIO, ASSIGNO R TO THE APEX MACHINE COM-PANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

t v -CI-IUCK.

Application filed October 2, 1924. Serial No. 741,138.

This invention consists of a new article of manufacture comprising adrill chuck having special features for the ready insertion, holding andremoval of the drill in the chuck portion. 7

These features will be set forth in detail hereinafter.

Referring to the drawings:

Figure 1 is a section through the chuck showing the quick attaching andquick detaching mechanism;

Figure 2 is an end elevation of the quick detaching mechanism;

Figure 3 is a plan view of the quick attaching mechanism.

Referring to the drawings in detail, 1 refers to a tubular-memberadapted to act as a chuck. Within this member is a tubular orcylindrical aperture 2 receiving the reciprocating bifurcated detachingmember 3. This member has a projecting head 1 which slides in anaperture 5 in the upper end of the cylindrical member 1 and projectsbeyond the end 6 thereof.

The lower end of 3 is bifurcated, being provided with a pair of legs 7which strad dle a cross pin 8 mounted transversely in the chuck 1...

The lower end of the chuck 1 has formed therein a socket portion 9,having an outwardly flaring interior cylindrical cavity 10 for receivinga correspondingly tapered split collar 11 which is formed-with aplurality of grooves 12. It is completely split by the slot 13 so thatthe shank of the tool 14 may be thrust within the interior of the splitcollar 11 and firmly held therein. It will be observed that the greaterthe thrust on the tool, the more securely it will be jammedwithin thecollar and the more securel the tapered exterior of the collar itselfwill be jammed vwithin the tapered socket portion 9. The upper end ofthe split collar engages against the bottom ofthe bifurcated member 7When it is desired to dislodge the tool and the split collar, a tap ofahammer on the upper end of the member 1 will result in dislodging thetool and its split collar. The cross pin 8 limits the {lownward movementof the unlocking memier 3..

It will be understood that I desire to comprehend within my inventionsuch modifications which may be necessary to adapt it to varyingconditions and uses.

Having thus fully described my invent-ion, what I claim as new anddesire to secure by Letters Patent, is

The herein described article of manufacture consisting of a cylindricalmember having a longitudinal opening extending therethrough, the upperportion of the opening being cylindrical and the lower being tapered, anunlocking member reciprocal in the cylindrical portion of the opening, a

tapered split collar fitted to the tapered portion and itself having acylindrical bore adapted to receive the shank of a tool, a

transverse stop pin secured to the cylindrical member, the lower end ofthe unlocking member being longitudinally slotted to fit over the stoppin an-d'having its lower end in contact with the top of the splicollar. In testimony whereof, I affix my signature.

IVILLIAM M. ZIEGLER.

